Menu costs suggest that sticky prices are ____ for firms but _____ for the economy as a whole

Threats to internal validity of quasi-experiments include

A) failure of randomization. B) failure to follow the treatment protocol. C) attrition. D) all of the above with some modifications from true randomized controlled experiments.

Contractionary fiscal policy may have a larger effect in reducing aggregate demand in an open economy than a closed economy

a. True b. False Indicate whether the statement is true or false